beevus6258 beevus6258

03-10-2018
Mathematics

contestada

If an = n(n+2), what is a9?

20

99

108

120

Respuesta :

Kamikazeminem Kamikazeminem

03-10-2018

[tex]a_{n} = n(n + 2) \\ a_{9} = 9(9 + 2) = 99[/tex]

Answer Link

03-10-2018

an = n(n+2)

⇒ a9 = 9(9+2) = 9 × 11 = 99

Answer Link

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